A parallel plate capacitor comprises of two square metal plates 500mm on a
side separated by 10mm. a slab of Teflon (Er-2) 6mm thick is placed on the
lower plate leaving an air gap 4mm thick between it and the upper plate. If
100V is applied across the capacitor. Find
(a) The electric field (E) in the air
(b) Electric field E in Teflon
(c) Flux density D in air
(d) Flux density D in Teflon and
(e) Potential V across Teflon Slab.